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Second part of fix for bug #605, make adding and removal of lines not case sensitive
[user/henk/code/inspircd.git] / src / xline.cpp
1 /*       +------------------------------------+
2  *       | Inspire Internet Relay Chat Daemon |
3  *       +------------------------------------+
4  *
5  *  InspIRCd: (C) 2002-2008 InspIRCd Development Team
6  * See: http://www.inspircd.org/wiki/index.php/Credits
7  *
8  * This program is free but copyrighted software; see
9  *          the file COPYING for details.
10  *
11  * ---------------------------------------------------
12  */
13
14 /* $Core */
15
16 #include "inspircd.h"
17 #include "xline.h"
18 #include "bancache.h"
19
20 /*
21  * This is now version 3 of the XLine subsystem, let's see if we can get it as nice and 
22  * efficient as we can this time so we can close this file and never ever touch it again ..
23  *
24  * Background:
25  *  Version 1 stored all line types in one list (one for g, one for z, etc). This was fine,
26  *  but both version 1 and 2 suck at applying lines efficiently. That is, every time a new line
27  *  was added, it iterated every existing line for every existing user. Ow. Expiry was also
28  *  expensive, as the lists were NOT sorted.
29  *
30  *  Version 2 moved permanent lines into a seperate list from non-permanent to help optimize
31  *  matching speed, but matched in the same way.
32  *  Expiry was also sped up by sorting the list by expiry (meaning just remove the items at the
33  *  head of the list that are outdated.)
34  *
35  * This was fine and good, but it looked less than ideal in code, and matching was still slower
36  * than it could have been, something which we address here.
37  *
38  * VERSION 3:
39  *  All lines are (as in v1) stored together -- no seperation of perm and non-perm. They are stored in
40  *  a map of maps (first map is line type, second map is for quick lookup on add/delete/etc).
41  *
42  *  Expiry is *no longer* performed on a timer, and no longer uses a sorted list of any variety. This
43  *  is now done by only checking for expiry when a line is accessed, meaning that expiry is no longer
44  *  a resource intensive problem.
45  *
46  *  Application no longer tries to apply every single line on every single user - instead, now only lines
47  *  added since the previous application are applied. This keeps S2S ADDLINE during burst nice and fast,
48  *  while at the same time not slowing things the fuck down when we try adding a ban with lots of preexisting
49  *  bans. :)
50  */
51
52 bool XLine::Matches(User *u)
53 {
54         return false;
55 }
56
57 /*
58  * Checks what users match a given vector of ELines and sets their ban exempt flag accordingly.
59  */
60 void XLineManager::CheckELines()
61 {
62         ContainerIter n = lookup_lines.find("E");
63
64         if (n == lookup_lines.end())
65                 return;
66
67         XLineLookup& ELines = n->second;
68
69         if (ELines.empty())
70                 return;
71
72         for (std::vector<User*>::const_iterator u2 = ServerInstance->Users->local_users.begin(); u2 != ServerInstance->Users->local_users.end(); u2++)
73         {
74                 User* u = (User*)(*u2);
75
76                 /* This uses safe iteration to ensure that if a line expires here, it doenst trash the iterator */
77                 LookupIter safei;
78
79                 for (LookupIter i = ELines.begin(); i != ELines.end(); )
80                 {
81                         safei = i;
82                         safei++;
83
84                         XLine *e = i->second;
85                         u->exempt = e->Matches(u);
86
87                         i = safei;
88                 }
89         }
90 }
91
92
93 XLineLookup* XLineManager::GetAll(const std::string &type)
94 {
95         ContainerIter n = lookup_lines.find(type);
96
97         if (n == lookup_lines.end())
98                 return NULL;
99
100         LookupIter safei;
101         const time_t current = ServerInstance->Time();
102
103         /* Expire any dead ones, before sending */
104         for (LookupIter x = n->second.begin(); x != n->second.end(); )
105         {
106                 safei = x;
107                 safei++;
108                 if (x->second->duration && current > x->second->expiry)
109                 {
110                         ExpireLine(n, x);
111                 }
112                 x = safei;
113         }
114
115         return &(n->second);
116 }
117
118 void XLineManager::DelAll(const std::string &type)
119 {
120         ContainerIter n = lookup_lines.find(type);
121
122         if (n == lookup_lines.end())
123                 return;
124
125         LookupIter x;
126
127         /* Delete all of a given type (this should probably use DelLine, but oh well) */
128         while ((x = n->second.begin()) != n->second.end())
129         {
130                 ExpireLine(n, x);
131         }
132 }
133
134 std::vector<std::string> XLineManager::GetAllTypes()
135 {
136         std::vector<std::string> items;
137         for (ContainerIter x = lookup_lines.begin(); x != lookup_lines.end(); ++x)
138                 items.push_back(x->first);
139         return items;
140 }
141
142 IdentHostPair XLineManager::IdentSplit(const std::string &ident_and_host)
143 {
144         IdentHostPair n = std::make_pair<std::string,std::string>("*","*");
145         std::string::size_type x = ident_and_host.find('@');
146         if (x != std::string::npos)
147         {
148                 n.second = ident_and_host.substr(x + 1,ident_and_host.length());
149                 n.first = ident_and_host.substr(0, x);
150                 if (!n.first.length())
151                         n.first.assign("*");
152                 if (!n.second.length())
153                         n.second.assign("*");
154         }
155         else
156         {
157                 n.first = "";
158                 n.second = ident_and_host;
159         }
160
161         return n;
162 }
163
164 // adds a line
165
166 bool XLineManager::AddLine(XLine* line, User* user)
167 {
168         ServerInstance->BanCache->RemoveEntries(line->type, false); // XXX perhaps remove ELines here?
169
170         /* If the line exists, check if its an expired line */
171         ContainerIter x = lookup_lines.find(line->type);
172         if (x != lookup_lines.end())
173         {
174                 LookupIter i = x->second.find(line->Displayable());
175                 if (i != x->second.end())
176                 {
177                         if (i->second->duration && ServerInstance->Time() > i->second->expiry)
178                                 ExpireLine(x, i);
179                         else
180                                 return false;
181                 }
182         }
183
184         /*ELine* item = new ELine(ServerInstance, ServerInstance->Time(), duration, source, reason, ih.first.c_str(), ih.second.c_str());*/
185         XLineFactory* xlf = GetFactory(line->type);
186         if (!xlf)
187                 return false;
188
189         if (xlf->AutoApplyToUserList(line))
190                 pending_lines.push_back(line);
191
192         lookup_lines[line->type][line->Displayable()] = line;
193         line->OnAdd();
194
195         FOREACH_MOD(I_OnAddLine,OnAddLine(user, line)); 
196
197         return true;
198 }
199
200 // deletes a line, returns true if the line existed and was removed
201
202 bool XLineManager::DelLine(const char* hostmask, const std::string &type, User* user, bool simulate)
203 {
204         ContainerIter x = lookup_lines.find(type);
205
206         if (x == lookup_lines.end())
207                 return false;
208
209         LookupIter y = x->second.find(hostmask);
210
211         if (y == x->second.end())
212                 return false;
213
214         if (simulate)
215                 return true;
216
217         ServerInstance->BanCache->RemoveEntries(y->second->type, true);
218
219         FOREACH_MOD(I_OnDelLine,OnDelLine(user, y->second));
220
221         y->second->Unset();
222
223         std::vector<XLine*>::iterator pptr = std::find(pending_lines.begin(), pending_lines.end(), y->second);
224         if (pptr != pending_lines.end())
225                 pending_lines.erase(pptr);
226
227         delete y->second;
228         x->second.erase(y);
229
230         return true;
231 }
232
233
234 void ELine::Unset()
235 {
236         /* remove exempt from everyone and force recheck after deleting eline */
237         for (std::vector<User*>::const_iterator u2 = ServerInstance->Users->local_users.begin(); u2 != ServerInstance->Users->local_users.end(); u2++)
238         {
239                 User* u = (User*)(*u2);
240                 u->exempt = false;
241         }
242
243         ServerInstance->XLines->CheckELines();
244 }
245
246 // returns a pointer to the reason if a nickname matches a qline, NULL if it didnt match
247
248 XLine* XLineManager::MatchesLine(const std::string &type, User* user)
249 {
250         ContainerIter x = lookup_lines.find(type);
251
252         if (x == lookup_lines.end())
253                 return NULL;
254
255         const time_t current = ServerInstance->Time();
256
257         LookupIter safei;
258
259         for (LookupIter i = x->second.begin(); i != x->second.end(); )
260         {
261                 safei = i;
262                 safei++;
263
264                 if (i->second->Matches(user))
265                 {
266                         if (i->second->duration && current > i->second->expiry)
267                         {
268                                 /* Expire the line, return nothing */
269                                 ExpireLine(x, i);
270                                 /* Continue, there may be another that matches
271                                  * (thanks aquanight)
272                                  */
273                                 i = safei;
274                                 continue;
275                         }
276                         else
277                                 return i->second;
278                 }
279
280                 i = safei;
281         }
282         return NULL;
283 }
284
285 XLine* XLineManager::MatchesLine(const std::string &type, const std::string &pattern)
286 {
287         ContainerIter x = lookup_lines.find(type);
288
289         if (x == lookup_lines.end())
290                 return NULL;
291
292         const time_t current = ServerInstance->Time();
293
294          LookupIter safei;
295
296         for (LookupIter i = x->second.begin(); i != x->second.end(); )
297         {
298                 safei = i;
299                 safei++;
300
301                 if (i->second->Matches(pattern))
302                 {
303                         if (i->second->duration && current > i->second->expiry)
304                         {
305                                 /* Expire the line, return nothing */
306                                 ExpireLine(x, i);
307                                 /* See above */
308                                 i = safei;
309                                 continue;
310                         }
311                         else
312                                 return i->second;
313                 }
314
315                 i = safei;
316         }
317         return NULL;
318 }
319
320 // removes lines that have expired
321 void XLineManager::ExpireLine(ContainerIter container, LookupIter item)
322 {
323         FOREACH_MOD(I_OnExpireLine, OnExpireLine(item->second));
324
325         item->second->DisplayExpiry();
326         item->second->Unset();
327
328         /* TODO: Can we skip this loop by having a 'pending' field in the XLine class, which is set when a line
329          * is pending, cleared when it is no longer pending, so we skip over this loop if its not pending?
330          * -- Brain
331          */
332         std::vector<XLine*>::iterator pptr = std::find(pending_lines.begin(), pending_lines.end(), item->second);
333         if (pptr != pending_lines.end())
334                 pending_lines.erase(pptr);
335
336         delete item->second;
337         container->second.erase(item);
338 }
339
340
341 // applies lines, removing clients and changing nicks etc as applicable
342 void XLineManager::ApplyLines()
343 {
344         for (std::vector<User*>::const_iterator u2 = ServerInstance->Users->local_users.begin(); u2 != ServerInstance->Users->local_users.end(); u2++)
345         {
346                 User* u = (User*)(*u2);
347
348                 for (std::vector<XLine *>::iterator i = pending_lines.begin(); i != pending_lines.end(); i++)
349                 {
350                         XLine *x = *i;
351                         if (x->Matches(u))
352                                 x->Apply(u);
353                 }
354         }
355
356         pending_lines.clear();
357 }
358
359 void XLineManager::InvokeStats(const std::string &type, int numeric, User* user, string_list &results)
360 {
361         std::string sn = ServerInstance->Config->ServerName;
362
363         ContainerIter n = lookup_lines.find(type);
364
365         time_t current = ServerInstance->Time();
366
367         LookupIter safei;
368
369         if (n != lookup_lines.end())
370         {
371                 XLineLookup& list = n->second;
372                 for (LookupIter i = list.begin(); i != list.end(); )
373                 {
374                         safei = i;
375                         safei++;
376
377                         if (i->second->duration && current > i->second->expiry)
378                         {
379                                 ExpireLine(n, i);
380                         }
381                         else
382                                 results.push_back(sn+" "+ConvToStr(numeric)+" "+user->nick+" :"+i->second->Displayable()+" "+
383                                         ConvToStr(i->second->set_time)+" "+ConvToStr(i->second->duration)+" "+std::string(i->second->source)+" :"+(i->second->reason));
384                         i = safei;
385                 }
386         }
387 }
388
389
390 XLineManager::XLineManager(InspIRCd* Instance) : ServerInstance(Instance)
391 {
392         GFact = new GLineFactory(Instance);
393         EFact = new ELineFactory(Instance);
394         KFact = new KLineFactory(Instance);
395         QFact = new QLineFactory(Instance);
396         ZFact = new ZLineFactory(Instance);
397
398         RegisterFactory(GFact);
399         RegisterFactory(EFact);
400         RegisterFactory(KFact);
401         RegisterFactory(QFact);
402         RegisterFactory(ZFact);
403 }
404
405 XLineManager::~XLineManager()
406 {
407         UnregisterFactory(GFact);
408         UnregisterFactory(EFact);
409         UnregisterFactory(KFact);
410         UnregisterFactory(QFact);
411         UnregisterFactory(ZFact);
412
413         delete GFact;
414         delete EFact;
415         delete KFact;
416         delete QFact;
417         delete ZFact;
418
419         // Delete all existing XLines
420         for (XLineContainer::iterator i = lookup_lines.begin(); i != lookup_lines.end(); i++)
421         {
422                 for (XLineLookup::iterator j = i->second.begin(); j != i->second.end(); j++)
423                 {
424                         delete j->second;
425                 }
426                 i->second.clear();
427         }
428         lookup_lines.clear();
429         
430 }
431
432 void XLine::Apply(User* u)
433 {
434 }
435
436 bool XLine::IsBurstable()
437 {
438         return true;
439 }
440
441 void XLine::DefaultApply(User* u, const std::string &line, bool bancache)
442 {
443         char sreason[MAXBUF];
444         snprintf(sreason, MAXBUF, "%s-Lined: %s", line.c_str(), this->reason);
445         if (*ServerInstance->Config->MoronBanner)
446                 u->WriteServ("NOTICE %s :*** %s", u->nick.c_str(), ServerInstance->Config->MoronBanner);
447
448         if (ServerInstance->Config->HideBans)
449                 ServerInstance->Users->QuitUser(u, line + "-Lined", sreason);
450         else
451                 ServerInstance->Users->QuitUser(u, sreason);
452
453
454         if (bancache)
455         {
456                 ServerInstance->Logs->Log("BANCACHE", DEBUG, std::string("BanCache: Adding positive hit (") + line + ") for " + u->GetIPString());
457                 if (this->duration > 0)
458                         ServerInstance->BanCache->AddHit(u->GetIPString(), this->type, line + "-Lined: " + this->reason, this->duration);
459                 else
460                         ServerInstance->BanCache->AddHit(u->GetIPString(), this->type, line + "-Lined: " + this->reason);
461         }
462 }
463
464 bool KLine::Matches(User *u)
465 {
466         if (u->exempt)
467                 return false;
468
469         if (InspIRCd::Match(u->ident, this->identmask))
470         {
471                 if (InspIRCd::MatchCIDR(u->host, this->hostmask) ||
472                     InspIRCd::MatchCIDR(u->GetIPString(), this->hostmask))
473                 {
474                         return true;
475                 }
476         }
477
478         return false;
479 }
480
481 void KLine::Apply(User* u)
482 {
483         DefaultApply(u, "K", (strcmp(this->identmask, "*") == 0) ? true : false);
484 }
485
486 bool GLine::Matches(User *u)
487 {
488         if (u->exempt)
489                 return false;
490
491         if (InspIRCd::Match(u->ident, this->identmask))
492         {
493                 if (InspIRCd::MatchCIDR(u->host, this->hostmask) ||
494                     InspIRCd::MatchCIDR(u->GetIPString(), this->hostmask))
495                 {
496                         return true;
497                 }
498         }
499
500         return false;
501 }
502
503 void GLine::Apply(User* u)
504 {       
505         DefaultApply(u, "G", (strcmp(this->identmask, "*") == 0) ? true : false);
506 }
507
508 bool ELine::Matches(User *u)
509 {
510         if (u->exempt)
511                 return false;
512
513         if (InspIRCd::Match(u->ident, this->identmask))
514         {
515                 if (InspIRCd::MatchCIDR(u->host, this->hostmask) ||
516                     InspIRCd::MatchCIDR(u->GetIPString(), this->hostmask))
517                 {
518                         return true;
519                 }
520         }
521
522         return false;
523 }
524
525 bool ZLine::Matches(User *u)
526 {
527         if (u->exempt)
528                 return false;
529
530         if (InspIRCd::MatchCIDR(u->GetIPString(), this->ipaddr))
531                 return true;
532         else
533                 return false;
534 }
535
536 void ZLine::Apply(User* u)
537 {       
538         DefaultApply(u, "Z", true);
539 }
540
541
542 bool QLine::Matches(User *u)
543 {
544         if (InspIRCd::Match(u->nick, this->nick))
545                 return true;
546
547         return false;
548 }
549
550 void QLine::Apply(User* u)
551 {       
552         /* Force to uuid on apply of qline, no need to disconnect any more :) */
553         u->ForceNickChange(u->uuid.c_str());
554 }
555
556
557 bool ZLine::Matches(const std::string &str)
558 {
559         if (InspIRCd::MatchCIDR(str, this->ipaddr))
560                 return true;
561         else
562                 return false;
563 }
564
565 bool QLine::Matches(const std::string &str)
566 {
567         if (InspIRCd::Match(str, this->nick))
568                 return true;
569
570         return false;
571 }
572
573 bool ELine::Matches(const std::string &str)
574 {
575         return (InspIRCd::MatchCIDR(str, matchtext));
576 }
577
578 bool KLine::Matches(const std::string &str)
579 {
580         return (InspIRCd::MatchCIDR(str.c_str(), matchtext));
581 }
582
583 bool GLine::Matches(const std::string &str)
584 {
585         return (InspIRCd::MatchCIDR(str, matchtext));
586 }
587
588 void ELine::OnAdd()
589 {
590         /* When adding one eline, only check the one eline */
591         for (std::vector<User*>::const_iterator u2 = ServerInstance->Users->local_users.begin(); u2 != ServerInstance->Users->local_users.end(); u2++)
592         {
593                 User* u = (User*)(*u2);
594                 if (this->Matches(u))
595                         u->exempt = true;
596         }
597 }
598
599 void ELine::DisplayExpiry()
600 {
601         ServerInstance->SNO->WriteToSnoMask('x',"Expiring timed E-Line %s@%s (set by %s %ld seconds ago)",this->identmask,this->hostmask,this->source,this->duration);
602 }
603
604 void QLine::DisplayExpiry()
605 {
606         ServerInstance->SNO->WriteToSnoMask('x',"Expiring timed Q-Line %s (set by %s %ld seconds ago)",this->nick,this->source,this->duration);
607 }
608
609 void ZLine::DisplayExpiry()
610 {
611         ServerInstance->SNO->WriteToSnoMask('x',"Expiring timed Z-Line %s (set by %s %ld seconds ago)",this->ipaddr,this->source,this->duration);
612 }
613
614 void KLine::DisplayExpiry()
615 {
616         ServerInstance->SNO->WriteToSnoMask('x',"Expiring timed K-Line %s@%s (set by %s %ld seconds ago)",this->identmask,this->hostmask,this->source,this->duration);
617 }
618
619 void GLine::DisplayExpiry()
620 {
621         ServerInstance->SNO->WriteToSnoMask('x',"Expiring timed G-Line %s@%s (set by %s %ld seconds ago)",this->identmask,this->hostmask,this->source,this->duration);
622 }
623
624 const char* ELine::Displayable()
625 {
626         return matchtext.c_str();
627 }
628
629 const char* KLine::Displayable()
630 {
631         return matchtext.c_str();
632 }
633
634 const char* GLine::Displayable()
635 {
636         return matchtext.c_str();
637 }
638
639 const char* ZLine::Displayable()
640 {
641         return ipaddr;
642 }
643
644 const char* QLine::Displayable()
645 {
646         return nick;
647 }
648
649 bool KLine::IsBurstable()
650 {
651         return false;
652 }
653
654 bool XLineManager::RegisterFactory(XLineFactory* xlf)
655 {
656         XLineFactMap::iterator n = line_factory.find(xlf->GetType());
657
658         if (n != line_factory.end())
659                 return false;
660
661         line_factory[xlf->GetType()] = xlf;
662
663         return true;
664 }
665
666 bool XLineManager::UnregisterFactory(XLineFactory* xlf)
667 {
668         XLineFactMap::iterator n = line_factory.find(xlf->GetType());
669
670         if (n == line_factory.end())
671                 return false;
672
673         line_factory.erase(n);
674
675         return true;
676 }
677
678 XLineFactory* XLineManager::GetFactory(const std::string &type)
679 {
680         XLineFactMap::iterator n = line_factory.find(type);
681
682         if (n == line_factory.end())
683                 return NULL;
684
685         return n->second;
686 }
687